1. The problem statement, all variables and given/known data A half controlled single bridge rectifier is supplying an R-L load. It is operated at firing angle 'alpha'. Load current is continous. What is fraction of cycle that the freewheeling diode conducts? 2. Relevant equations 3. The attempt at a solution Well I guess each diode will conduct for half the cycle like from 0 to pie and then from pie to 2 pie, the other diode will conduct. So the answer must be 1/2. But book answer is alpha / pie.